THERMAL SCIENCE

International Scientific Journal

Miroljub V. Tomić

,

Dragan M. Knežević

,

Miloljub S. Štavljanin

EFFECT OF ENGINE CYLINDER DEACTIVATION ON FUEL ECONOMY AND CRANKSHAFT SPEED VARIATIONS

ABSTRACT
In this paper the cylinder deactivation technique in spark ignition engines was investigated. The potential of this concept was analysed using engine working cycle simulation model AVL Boost. The engine power output regimes corresponding to the vehicle moderate constant driving speeds were considered and the results show that at that low load engine operating regimes cylinder deactivation can enable fuel economy improvement of about 6%-13% and corresponding CO2 emission reduction. The angular speed variations of engine crankshaft under cylinder deactivation conditions were also analysed and it was found that the speed variations increase several times compared to the standard operation of the engine with all active cylinders.
KEYWORDS
spark ignition engine, Cylinder deactivation, Fuel economy, Crankshaft speed variations
PAPER SUBMITTED: 2024-04-07
PAPER REVISED: 2024-10-29
PAPER ACCEPTED: 2024-11-05
PUBLISHED ONLINE: 2024-12-07
DOI REFERENCE: https://doi.org/10.2298/TSCI240407261T
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2025, VOLUME 29, ISSUE Issue 2, PAGES [1631 - 1642]
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Effect of engine cylinder deactivation on fuel economy and crankshaft speed variations

2025 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence